Results 1 to 12 of 12

cut off my cats today

This is a discussion on cut off my cats today within the External Engine forums, part of the LSx Technical Help Section category; Well today i went to the muffler shop. I had my cats cut off and made a custom Y pipe, ...

  1. #1
    Member emoFTW's Avatar
    Join Date
    Sep 2008
    Location
    Oklahoma
    Posts
    321

    black
    99 Z28

    cut off my cats today

    Well today i went to the muffler shop. I had my cats cut off and made a custom Y pipe, I then put a vibrant ultra quite resonator on the exhaust system as well. and at the end i have a flowmaster 80 series muffler. Cutting off the cats and putting that resonator on my car made it very quite... even more quite than when i had the cats on. I kinda like it... just wish it was louder!

    anybody know what the difference between the 40 series and 80 series mufflers?

  2. #2
    Member MnLS1's Avatar
    Join Date
    Jan 2008
    Location
    SW Metro, MN
    Age
    34
    Posts
    220

    White
    1999 SS

    why didnt you wait and get long tubes and an ory if I may ask? Then it wouldve been alot louder!

  3. #3
    Senior Member INMY01TA's Avatar
    Join Date
    Jan 2006
    Location
    The great red state of MD.
    Posts
    5,755

    Black
    2001 Trans Am (sold)

    The 80 series is a crossflow design made for the f bodies. In one side, then out both sides. If you want it louder why not just take the resonator off?

  4. #4
    Impounded
    Join Date
    May 2008
    Location
    Verdigris, OK
    Posts
    2,165

    NBM
    99 z28

    dont know the specifics but i have the super 40 and it is much louder than the 80 series.


    40 series is also single in/dual out.

  5. #5
    Senior Member INMY01TA's Avatar
    Join Date
    Jan 2006
    Location
    The great red state of MD.
    Posts
    5,755

    Black
    2001 Trans Am (sold)

    Quote Originally Posted by Boomer Sooner View Post
    dont know the specifics but i have the super 40 and it is much louder than the 80 series.


    40 series is also single in/dual out.
    Isn't that in one end then both out the other end.

  6. #6
    Impounded
    Join Date
    May 2008
    Location
    Verdigris, OK
    Posts
    2,165

    NBM
    99 z28

    Quote Originally Posted by INMY01TA View Post
    Isn't that in one end then both out the other end.
    no. only 1 "in" pipe then there is two tail pipes, one on each side.

  7. #7
    Member emoFTW's Avatar
    Join Date
    Sep 2008
    Location
    Oklahoma
    Posts
    321

    black
    99 Z28

    Quote Originally Posted by MnLS1 View Post
    why didnt you wait and get long tubes and an ory if I may ask? Then it wouldve been alot louder!

    because i dont have that kind of money to spend, the shop gave me a good deal and i couldnt refuse it.

  8. #8
    Member emoFTW's Avatar
    Join Date
    Sep 2008
    Location
    Oklahoma
    Posts
    321

    black
    99 Z28

    Quote Originally Posted by INMY01TA View Post
    The 80 series is a crossflow design made for the f bodies. In one side, then out both sides. If you want it louder why not just take the resonator off?
    cause i didnt want it to be raspy. but its super quiet... quiet like stock lol but it deff help performance wise.

  9. #9
    Your dealership guy konigandy6's Avatar
    Join Date
    Aug 2007
    Location
    Romeo, MI
    Posts
    6,557

    Velocity Yellow
    2008 Corvette Z06

    80 series flowmasters are terrible for performance and for sound quality. Worse than stock IMO... I cut mine off about 3 days after owning my car for the SLP LM2 set up. Much louder and a LOT more performance!! Ditch the 80 series for a serious set up such as magnaflow or borla... The quality speaks for itself.

    2008 Z06 - Velocity Yellow - OEM

    2017 Silverado Z71 5.3 - OEM

    2002 Z06 - Electron Blue Metallic - D1 - E85 - 701 rwhp 687 rwtq **sold**

    2002 Z28: M6 NBM - cam and boltons - 396rwhp 357 rwtq **sold**

  10. #10
    Member WS6ICK2K's Avatar
    Join Date
    Jan 2008
    Location
    Pittsboro NC
    Posts
    587

    Metallic Blue
    2000 Trans Am WS6

    Theres even a thread on here that flowmaster flows as worse as stock to back it up. IMO I would def take the resonator off. I wont be that raspy, and alot louder.

  11. #11
    Member Bouvers's Avatar
    Join Date
    May 2006
    Location
    Canada
    Age
    31
    Posts
    857

    Blue 1997 Trans Am(Sold)
    Pewter 2001 Trans Am Vert

    what you could do although this is kind of an extreme measure is get a manual exhaust cutout... it would be cheap. Then you could have clean deep exhaust when you want and when you want it to be loud as hell you can just uncap it...

    just thought I would throw it out there...

  12. #12
    Impounded
    Join Date
    Oct 2007
    Location
    Beaver Dam KY
    Posts
    7,746

    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    im keeping my 80 series till i get the TDs. I just run a cutout instead. A lot cheaper and a lot louder.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Cats VS No Cats for a catback exhaust system
    By Guerrillakilla13 in forum Firebird / WS6
    Replies: 23
    Last Post: 04-25-2011, 11:33 AM
  2. CATS!!! Cats on my Paint :(
    By Intrepidman in forum Almost Anything Goes
    Replies: 41
    Last Post: 03-28-2009, 08:29 AM
  3. Cats? No Cats? High Flow Cats??
    By lx24 in forum Firebird / WS6
    Replies: 2
    Last Post: 08-17-2007, 09:11 PM
  4. bad cats....
    By jbb6811 in forum Camaro / SS
    Replies: 4
    Last Post: 01-08-2007, 06:51 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •